Pistons

The operational safety and durability of a repaired engine depends primarily on the used pistons and the mechanic's quality of work. When repairing the engine, all the necessary conditions must be created to ensure the high quality of the KS Kolbenschmidt pistons can become fully effective.

For this reason, installation of KS Kolbenschmidt pistons during engine repair work already starts with preparation or reconditioning of the engine to be repaired.

All original KS Kolbenschmidt pistons are supplied ready to install together with the relevant piston rings, piston pins and pin retainers.

Piston designs

Kolbenschmidt is an OE supplier and supplies parts to all well-known engine manufacturers – all over the world. For every engine type the most suitable alloy is selected from the KS Kolbenschmidt alloy range, and the most effective piston design is employed.

KS Kolbenschmidt pistons feature special LofriKS®, NanofriKS® or graphite coatings on the piston skirt. These reduce friction inside the engine and ensure good emergency running properties. LofriKS® coatings are also employed for acoustic reasons. Their use minimises piston slap noises. NanofriKS® is a further development of the tried and tested LofriKS® coating, and additionally contains nanoparticles of titanium oxide, to increase the coating’s wear resistance and durability.

Gap Dimension and Top Dead Centre

Gap dimension

The gap dimension (B) is the protrusion or recess of the piston in the top dead centre in relation to the sealing face of the cylinder block. The thickness of the cylinder head gasket and a possible recess in the cylinder head are taken into account for measuring. This dimension is also known as “lead dimension”.

Piston protrusion or piston recess dimension in top dead centre for different engine versions

Below the dimension C, the protrusion (marked by + ) or the recess (marked by - ) of the piston in the top dead centre is to be understood in relation to the cylinder block sealing face. The seal thickness or geometrical shapes of the cylinder head are not taken into account.

For engines with wet cylinder liner, the protrusion or recess of the piston is also measured in relation to the cylinder block face. A protrusion of the cylinder liner or an existing land edge is not taken into account.

For air-cooled cylinders, dimension C refers to the distance between piston crown and the seat of the cylinder head on the air cooled cylinder.

For setting the piston protrusion, pistons with reduced compression height arealso available in addition to the standard pistons.

For pistons the crown for setting the piston protrusion must not be turned off.

Use of cookies and data protection

Motorservice Group uses cookies saved to your device in order to optimize and continuously improve its websites, as well as for statistical purposes.
Further information on our use of cookies can be found here, together with our publication details and data protection notice.

By clicking on “OK” you confirm that you have taken note of the information on cookies, the data protection declaration and the publication details. You can also change your cookie settings for this website at any time.

Privacy settings

We place great importance on transparent information relating to all aspects of data protection. Our website contains detailed information on the settings you can select and what effect these settings have. You can change your selected settings at any time. Regardless of the selection you choose, we will not draw any conclusions regarding you as a person (except where you have explicitly entered your details). For information on deleting the cookies, please see the help function in your browser. You can find out more in the data protection declaration.

Change your privacy settings by clicking on the corresponding buttons

Necessary

Cookies essential for the system ensure that the website works correctly. Without these cookies, malfunctions or error messages may occur.

This website will:

Store cookies required by the system

Store the settings you make on this website

This site wil never do the following without your agreement:

Store your settings, such as the language selection or cookie banner, so that you do not have to repeat them in the future.

Evaluate visits anonymously and draw conclusions to help us to optimize our website.

Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Convenience

These cookies make the website easier to use and save settings, for example, so that you do not have to repeat them every time you visit the site.

This website will:

Store cookies required by the system

Store your settings, such as the language selection or cookie banner, so that you do not have to repeat them in the future.

This site wil never do the following without your agreement:

Evaluate visits anonymously and draw conclusions to help us to optimize our website.

Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Statistics

Statistics cookies enable us to evaluate the usage behaviour on the website anonymously – without enabling any conclusions to be drawn about you as a person. This enables us to measure the performance of the website and to improve it continuously to offer a better user experience.

This website will:

Store cookies required by the system

Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Evaluate visits anonymously and draw conclusions to help us to optimize our website.

This site wil never do the following without your agreement:

Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Of course, we will always respect the do-not-track (DNT) setting in your browser. In this case, no tracking cookies are set and no tracking functions are loaded.